Question

The performance equation for CSTR is_________

(a) \(\frac{τ}{CA0} = \frac{XA}{-rA} \)

(b) τ = \(\frac{XA}{-rA} \)

(c) τ = CA0 -rA

(d) τ = \(\frac{XA}{CA0(-rA)} \)

I had been asked this question during an internship interview.

Question is from Design Equations for Flow Reactors in chapter Ideal Reactors for a Single Reaction, Conversion and Reactor Sizing of Chemical Reaction Engineering

Answer 1

Right choice is (a) \(\frac{τ}{CA0} = \frac{XA}{-rA} \)

Easy explanation: General design equation of CSTR is modified and written in terms of initial concentration and space time to get the above equation.